If you're having trouble finding all the Gold Skulltulas, take a glance at my list. It has the locations of all 100 Golden Skulltulas!

Gold Skulltulas are the golden spiders which can only be found in dungeons and the Land of Hyrule. They only appear at night. By killing them, you break the curse on the family of Skulltula in Kakariko Village. Talk to a member of the family after killing a certain number of Gold Skulltulas to recieve a prize. Certain Skulltulas only appear when Link is a child and others when he is an adult.

What You Get:
10=Adult's Wallet (Holds 200 Rupees)
20=Stone of Agony
30=Giant's Wallet (Holds 500 Rupees)
40=Bombchu
50=Piece of Heart
100=Gold Rupee (Worth 200 Rupees)

Kokiri Forest
Back of the Know-it-All-Bros' House as a child
Plot of Soft Soil near Shop, you need a bottle of bugs to get it
Back of the Twins' house, you must be an adult and have the hookshot

Hyrule Field
Underneath rock in circle of stones in front of Gerudo Valley, you must be a child and have bombs and a boomerang or an adult with the Megaton Hammer, Hookshot, Din's Fire or Fire Arrows
Hidden hole in tree outside Kakariko Village, you must be a child and have bombs and a boomerang

Hyrule Castle/Market
Roll into the tree near the entrance to the castle (outside gate)
In a hidden hole in the tree near where you woke Talon up, you must be a child with bombs, boomerang, and the Song of Storms
Break the crates near the guard in the first door to your right after entering the market, you must be a child

Kakariko Village/Graveyard
Soft soil in the Graveyard, you must be a child and have a bottle of bugs
Outer wall in the Graveyard, you must be a child and have the boomerang
On top of Impa's House, you must be an adult with the Hookshot
Rollinto the tree at the entrance to the village, Child
Side of the Graveyard kid's house, Child
Side of the House of Skulltula, Child
On the stack of bricks at the unfinished building, Child
On the ladder of the watchtower, Child, Slingshot

Lon Lon Ranch
Roll into the tree in the gate, Child
Back of the corral shed, Child
Outer Wall, northwest of the storage shed, Child, Boomerang
Second-story window, Child, Boomerang

Lake Hylia
Top of the dead tree, above the Water Temple, Adult, Longshot
Soft soil outside of the lab, child, bottle of bugs
Break the crate at the bottom of the pool in the labratory, Adult, Iron Boots
Back of the Labratory, Child, Boomerang
Playform in the Lake with the 2 "goalposts"

Lost Woods
Dirt Patch, northwest of the Zora Shortcut, Child, Bottle of Bugs
Dirt Patch, south of the single skull kid, Child, Bottle of Bugs
Room northwest of the Zora Shortcut, Adult, Magic Bean Leaf

Sacred Forest Meadow
On the outer wall on the end nearest the Forest Temple, Adult, Hookshot

Haunted Wasteland
In the basement of a stone house in the middle of the desert, Adult

Goron City
Boulder room inside crate, Child, Bombs
Behind stone on the center platform, Adult, Hookshot

Gerudo Valley
Outer wall, right of the log bridge, Child, Boomerang
Under a stone arch, Adult, Hookshot
Dirt Patch on lower ledge, Child, Bottle of Bugs
Behind the Carpenters' tent, Adult, Hookshot

Gerudo's Fortress
Outer Wall...Center of the east side, Adult, Hookshot
Small target at the far end of the Horseback Archery, Adult, Hookshot

Death Mountain Trail
Dirt patch by Dodongo's Cavern, Child, Bottle of Bugs
Pound the rock outside Goron City (above Dodongo's Cavern, Adult, Hammer
Bomb false wall to the first cave, Child or Adult, Bombs
Pound the last rock before climbing the wall to the Giant Goron, Adult, Hammer

Death Mountain Crater
Inside the crate at the entrance, Child
Dirt Patch near the warp point, Child, Bottle of Bugs

Desert Colossus
Dirt Patch at Spirit Temple entrance, Child, Bottle of Bugs
Palm tree near dry pond, Adult, Hookshot
Ride leaf to the top of the dunes, Adult, Magic Bean Leaf

Great Deku Tree
Compass room, Child, Slingshot
Basement (Wall), Child, Slingshot
Basement (Grate), Child, Slingshot
Bomb false wall in the room with baby gohmas, Child, Bombs, Boomerang

Dodongo's Cavern
Alcove above the raised stairs, Alcove above the raised stairs, Child, Boomerang or Adult, Hookshot
Baby Dodongo Room (Bomb false wall), Child, Bombs, or lure a baby Dodongo to the wall and it may blow up the wall for you if it is close enough.
Baby Dodongo Room (Hidden Ledge), Adult, Hookshot, Scarecrow's Song
Bomb the false wall in the northernmost room on floor 1, Child, Bombs
Behind the Armos Knights, Child

Jabu-Jabu's Belly
"Basement" wall, Child, Boomerang
"Basement Wall, near big Octo's room
On "climbable" wall in the room berfore the boss, Child, Slingshot
One more but my guide has a misprint, sorry.

Zora's River
Outer Wall, South-Center, up high, Adult, Hookshot
Outer Wall, before the entrance to Zora's Domain, Adult, Hookshot
Roll into the tree at the entrance, Child
On a ladder near the waterfall, Child, Slingshot

Zora's Domain
Top of the frozen waterfall, Adult, Hookshot or Longshot

Zora's Fountain
Outer wall, west of the fallen log, Child, Slingshot
Roll into the tree in the southwest corner, Child
Secret cave beneath the boulder in front of hidden Great Fairy Fountain, Adult, Silver or Golden Gautlets

Forest Temple
Treasure room in the basement, Adult
Entrance to the temple, on the wall, Adult, Hookshot
On the wall of the left inner courtyard, Adult, Hookshot
On the wall of the right inner courtyard, Adult, Hookshot
Main Hall, on wall near door to the north room, Adult, Hookshot

Fire Temple
First Like-Like room, Adult
Second Like-Like room, Adult
Bomb false wall in the boulder maze, Adult, Bombs
East Tower, Adult, Scarecrow's Song, Hookshot
East Tower, Adult, Scarecrow's Song, Hookshot

Ice Cavern
In the blue fire room, near the piece of heart, Adult, Hookshot
On wall in the Ice Block puzzle room, Adult, Hookshot
Room with the Ice Scythe, Adult, Hookshot

Water Temple
In hidden area off boulder room, near boss key, Adult, Longshot
Spin attack to hit a switch in basement cell, Adult, Charged Spin Attack
On the wall in the cascading falls room, Adult, Longshot
On the wall in the whirlpool-filled stream, Adult, Longshot
Top of the center tower, Adult, Longshot

Shadow Temple
Room on Floor B3 with stealth scythes and key, Adult
Room with "Stone Umbrella", Adult
Blow up spinning vase room, Adult
In caged area near Ferryboat, Adult, Scarecrow's Song, Longshot
Room with 3 skull vases, Adult

Spirit Temple
Room with bats and gate, Child Slingshot
On a "rough" wall, Child
Wall of main chamber, Adult, Scarecrows's Song, Longshot
Hallway leading to first sub-boss, Child, Boomerang
Boulder room, move with the "song of Time", Adult

Bottom of the Well
Cell with a Like-Like, Child
Room with the false floor, Child
Room with Deku Baba, Child

Ganon's Castle
Outside, back of brick arch where gate to Hyrule castle used to be, Adult, Hookshot