GTT is covered by the following sell-side analysts:
| Broker | Analyst |
| AlphaValue | Frédéric Lorec |
| Berenberg | Richard Dawson |
| Bernstein / Société Générale | Guillaume Delaby |
| CM CIC | Jean-Luc Romain |
| Goldman Sachs | Michele Della Vigna |
| Jefferies | Jamie Franklin |
| Kepler Cheuvreux | Kevin Roger |
| Morgan Stanley | Guilherme Levy |
| Oddo | Jean-François Granjon |
| Portzamparc | Nicolas Royot |
| UBS | Henri Patricot |