I don't grow L. gouldiana but I think it always helps to know how an orchid grows in the wild. Here's the information on gouldiana from the Baker's culture sheet.
ORIGIN/HABITAT: Mexico. Halbinger and Soto (1997) report that these plants are cultivated in the state of Hidalgo, northeast of Mexico City, at 3950–6250 ft. (1200–1900 m). They are grown most often in a region of deep ravines and are almost always found on mesquite trees in dry, brushy areas in the semiarid mountains. -- Source: Charles Baker