On this side, I'll put down some information on how to connect the Conrad-Electronics "GPS-Mouse" GX107 to a PC.
The mouse has a small PCB connector and is designed to work together with a GSM module to remote control whatever system you want via SMS messages.
After some measurements, I figured out how to connect it to a PC.
| Wire WHITE | GPS RX | connect to +5V via 10k |
| Wire GREEN | GPS TX | GPS NMEA Strings as inverted TTL Signal |
| Wire YELLOW | GND | |
| Wire BLUE | "enable" | connect to +5V |
| Wire BLACK | POWER | connect to +5V |
| Wire RED | unused |
To power the GPS-Mouse, I used a TRACOpower TEL 2-1211 DC/DC converter. The inverted TTL signal from the GREEN Wire has to pass an MAX232 to reach the COM-Port.
| 9600 Baud | 8 Databits | No Parity | 1 Stopbit |