the installation is simpler than eating ice cream just extract the com.rockstargames.gtasa folder in Android / Data
now in the folders cutscene, gta3, gtaint and txd  rename the files according to the gpu of your mobile
by default it is configured for mali GPU
GPU
Adreno: dxt
Mali: etc
Powervr: pvr
 
 link
https://drive.google.com/file/d/16X14BPiAKUlLZuymHiTqxLavpH0kzMfa/view?usp=drivesdk