Adam,
What types of health issues have you heard? I am not aware of any at this time. I do not know of any common house plants where a contact issue exists, and believe the plant would need to be ingested before there would be a possibility of toxicity issues. I have used many different species of house plants in these setups (Philodendron, Calathea, Silver Spear, Croton, Spotted Laurel, Sansevieria, Schefflera, etc), and never seen a problem with any species of snake. The main thing to avoid damage to the plants by arboreal snakes is to have plenty of branches to support them while they are moving about. However, the smaller, very young GTP's will use about anything.

Kelly