The Samsung Galaxy Tab Active4 Pro is equipped with an integrated GPS module that supports various satellite systems such as GPS, GLONASS, Galileo, Beidou and QZSS. Here are some important points for your question:

## External GPS antenna
- It is technically possible to use an external GPS antenna, but the connection via the USB-C port of the Tab Active4 Pro is not directly possible if it is an antenna that transmits a signal via the USB port. External GPS antennas or receivers that are connected via USB are usually designed as separate receivers that send the signal to the device via Bluetooth or WiFi.

## Signal detection and navigation software
- The device can recognise the signal from an external GPS antenna or GPS receiver when connected via Bluetooth or WiFi. However, there is no direct support for connecting an external GPS antenna via the USB-C port.

## Recommendation for navigation software
- Various navigation software applications other than Google Maps can be used for navigation on the Tab Active4 Pro. Here are some recommendations:
- OsmAnd: A popular app for offline navigation that offers detailed maps and various navigation features.
- Gaia GPS: Another popular app that is especially suitable for outdoor activities such as hiking, cycling and off-road driving.
- Lucas Maps: An app that specialises in detailed maps for off-road navigation and is often mentioned in videos and guides.

These apps can work with the integrated GPS of the Tab Active4 Pro or with an external GPS receiver connected via Bluetooth or WiFi.