With version 0.35 a new feature was added to tcx2hrm. With previous version, the GPS related information within the TCX file was more or less lost, as the HRM file specification does not provide any support for GPS data.
However, tcx2hrm now simulates the same behaviour as Polar devices coupled with the Polar G3 sensor do: On request iIt generates an additional, separate GPX compatible file with the GPS data only. GPX is an open standard for interchanging GPS data, many GPS applications support GPX files. E.g. Polar Pro Trainer checks on importing HRM files, whether a GPX file is existing with the same name as the HRM file.
For more information on that new feature, please refer to the tcx2hrm documentation page.