Custom models

Hello. I have model for HL2 in C:\Program Files\Steam\steamapps***\half-life 2\hl2\models\zombieeee\zombie.mdl
How can spawn this model from gmod spawn menu?

Put it in
C:\Program Files\Steam\steamapps\ *** \garrysmod\garrysmod\models\zombieeee\zombie.mdl
Then use browse tab to find it.