Both GML and TIF formats are often used to store maps, geography or GIS data, so it's fair to assume that some kind of gml to tif conversion is indeed doable. Your best option in this case is to take advantage of one of the dedicated GIS conversion solutions, for example the Total GIS Converter.
This export is typically used for the purpose to turn data sets in GML format (for example building/rooftop data in CityGML format) to a raster map in TIFF format.
Updated: November 2, 2023