Unknown "GG6M" smd integrated circuit
It could be a LC3406 Synchronous buck converter: datasheet here.

According to the datasheet, this chip is in a SOT-23-5 package, which really looks like what you have, and has a "GG" marking followed by two characters indicating year and week, which is consistent with what you have.

We see a big inductor next to the chip, two resistors that look like a feedback network, and what certainly is an input capacitor, and if we check the tracks layout on your photos, it is all consistent with the pinout described in the datasheet.

For info: I went on this site to find this information. But there are plenty of other sites/databooks referencing component markings.