Upgrade AR750S but keeping GL-inet GUI


It is my first post on this forum :slight_smile:
I would like to upgrade my AR750S to newest OpenWRT but would like to keep GL-inet GUI. Is it possible?
By the way it seems that just upgrading OpenWRT 18.06 (my current firmware) to 19.07 is not possible with this device.
OpenWRT wiki for this router: https://openwrt.org/toh/gl.inet/gl-ar750s contain “Upgrading OpenWrt” part and I am going to use terminal method (sysupgrade or mod) but do not know which firmware file should I use. Can you point me to correct file?
Will survive GL-inet simple GUI after this update or will be available only Luci or only terminal?

Best regards

Here you have new GL.iNet firmwares

Testing folder is firmware OpenWrt 19.07.7 r11306-c4a6851c72

but here
GL.iNet download center and choosing AR750S
You have more new testing firmwares. TESTING and BETA.