Is this PC ok for a little gaming?

CPU: AMD RYZEN 2200G (socket AM4) with 4 X 3.5GHz

RAM: 16GB DDR4 from GSkill

HDD: 120GB SSD (for fast loading times) + 1TB (1000GB) (SATA)

Drive: Multi DVD burner

Graphics: AMD Radeon R9 280X

The PC is intended for occasional Minecraft and GTA players.

For Minecraft and GTA V it is enough if you do not overdo it with the settings.

Yes that should be enough for Minecraft and GTA, just without any shaders or very high settings or so

Should fit that way, but it can be that Minecraft runs almost better with the iGPU than with the R9.

Yes, it's enough, as long as you don't want to stream an Ark, you have a similar setup, bit worse and that's enough to do z. B Stream Valorant on medium graphics.

Valorant also runs on any dirty PC.

The setup is okay. As a processor, maybe something in the direction of Ryzen 5 1600 AF or Ryzen 3 3100.