According to the Maya way of thinking, which can still be found when talking about traditional medicine in Guatemala, human diseases can be distinguished in "natural", "supernatural", diseases caused by "Gods of the Earth" or diseases from the "lower world". The "curandero" is the person who takes care of these diseases and generally a person become a "curandero" after he had a particular dream and the more he dreams the more he become wise. 

In such a context, in 1988, GRT started to work in Guatemala, initially by carring out a research on traditional medicine funded by the European Union and implemented in a Maya K'Iche' community in Totonicapan and afterwards through the implementation of different projects concerning traditional medicine and ethnic minorities. 

The organisation has achieved important results also in the health sector and in the education one as well as in the local production through microcredit loans.