Correct is for PADCTL register of PQ.06
Please refer to the above info from TRM that all control registers use the same base address of GPIO_CTL as following.
So, please use 0x02200000(GPIO_CTL) + 0x126c0(GPIO_Q_ENABLE_CONFIG_06_0) = 0x022126c0 for ENABLE_CONFIG of PQ.06
Please try to control it and check if the pin state would be changed.