Hello rodri16,
I tried the TTGO beam and I did have the same problem as you guys. I was not able to put the GPS in sleep mode and the current was about 50 mA. I then desoldered the GPS module and the current went to 2.2 mA, ever so this is much better, for a low battery application this is still pretty high.
I also tried the TTGO LoRA V2.0 the current in sleep mode is 0.16 mA for this chip. (I did also remove a LED that didn’t turn off, I don’t know if this LED is connected to a GPIO).
Serial.println("go in to sleep");
esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR);
esp_deep_sleep_start();