Just want to make a list of things that we can GIM because I don't know of any other.
Chest | Item obtained | Video
So far we know of:
Kokiri Sword | Item 200 (RBA points to Forest Map) over Deku Sticks | https://youtu.be/BLMRqWTu0mE
(Deku Tree) B1F Heart | Weird Egg | https://youtu.be/sFSJhYu1Sos
(Deku Tree) Map | Hammer | https://youtu.be/OVuZv5-wuBo
Mirror Shield | +1 Stick | https://youtu.be/LHim0wHXTmk
Silver Gauntlets | Ice Arrows | https://youtu.be/LHim0wHXTmk
Jabu Compass | Medallions (get forest, water, spirit; lose light, fire, shadow) | https://youtu.be/0Ex4IfD2BRw
Water Compass | ^^ | https://youtu.be/ZWwsgq7m6HA
Not sure whats in this chest | Kokiri Emerald | https://youtu.be/XunmIbpAS2g
BotW ? | ? | https://youtu.be/n8ABjnco56c
The two MQ Compass GIMs make me want to look for a compass GIM in OoT3D. If we find it in Deku, DC, Jabu, Forest, or Shadow we can skip Spirit completely, and Shadow we'd probably have to enter anyway to get hovers. This only leaves getting the bow for a NoWW route, or maybe even a NoRBAWW route.
Reply with any other GIMs that I missed. This list is not complete.