GG thinks it has bone animation. GG trees use a shader to move the leaves.
Take a look at one of the trees in the mega pack 3 stuff and note the shader is apbr_trees.fx
No bones to make things move.
;header
desc = Beech
;visualinfo
textured = beech_color.dds
effect = effectbank\reloaded\apbr_tree.fx
castshadow = 0
transparency = 6
cullmode = 1
;orientation
model = beech.X
offx = 0
offy = 0
offz = 0
rotx = 0
roty = 0
rotz = 0
defaultstatic = 1
materialindex = 3
collisionmode = 1
;LOD System
disablebatch = 1
lod1distance = 5000
lod2distance = 7000
;statistics
strength = 25
explodable = 0
debrisshape = 1
;ai
aiinit = appear1.lua
aimain = default.lua
aidestroy = disappear1.lua
;spawn
spawnmax = 0
spawndelay = 0
spawnqty = 0
playanimineditor = 1
Intel(R) Core(TM) i9-10900 CPU @ 2.81GHz, 32GB RAM, Nvidia RTX 2060 super 8gb, Windows 10 Home 64bit, Screen resolution 1920 x 1080
Intel(R) Core(TM) i5-8400 CPU @ 2.81GHz, 32GB RAM, Nvidia gtx1050ti 4gb, Windows 10 Home 64bit, Screen resolution 1920 x 1080. System Passmark 3774