This is official G-Tide V7 firmware which is flashable via SP FlashTool. If your device is G-tide V7, download the firmware from the link provided below, alongside SP FlashTool.
Note: This firmware is specifically meant for G-tide V7. Do not attempt installing on any other device. If you’re looking for your device official firmware, use the comment section to request for it.
If you experience any problems while trying to flash the firmware package, please refer to this .bin firmware flashing guide.