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Should your terminal and the GPS be confirmed to have matching settings, then probably the data you see is correct and it is only how the characters are being displayed which is unusual.
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If that is the case, you’d be able to find documentation on either how to change the GPS’s UART settings, or else the setting for your (CH341) UART which would match the GPS. I recall seeing some GPS units in the past that have a fixed UART setting and the other UART is forced to match the GPS’s UART. What you’d want to do is see if you can find the documentation for the GPS itself, and see if serial UART settings can be changed or not. It does not hurt to try, and there wouldn’t be any damage if settings differ, so it is ok to experiment (two UART connections have to be matching voltage levels, but software settings cause no harm when wrong…they just won’t work as expected). The other half of the UART connection is the one in the actual GPS. If a UART at either end has the wrong parity or stop bits, then the data won’t be interpreted correctly. I don’t know with your particular (CH341) UART, but consider that there are always two UARTs involved even if each end only sees one UART. So far as default settings go on the integrated UARTs of a TX2, this is always speed 115200, 8 bits, no parity, and one stop bit. Do you suggest that I change these parameters and see if I get any results?