Unfortunately the first few kilometres of this trail till the Lago Sella are along a car road. The region is however full of marmots; this makes the walk nicer.
From the Lago Sella a path turns on the right and goes up to the intersection direction Gloggentürmli. At the intersection at p.2468 we took the path on our right, passed the Sasso di Paisgion and later crossed the south edge of the Gamsspitz. Then we continued to the Guspissattel and reached the summit of the Pizzo Centrale coming from its south side. We went back to the edge of the Gamsspitz and I climbed it till the top, later descending from the same route and going back to Passo San Gottardo via direct path.
The direct ascent to the Pizzo Centrale is quite easy; T1 till Lago Sella, T2 till p. 2468 and then T3. The climbing of the south edge of the Gamsspitz is for sure more difficult but never really dangerous (T4; I).
In general this trail can be classified as an easy (almost) 3000 summit. Although the region is nice, the military roads as well as the military buildings make it less wild... I performed this tour with Eveline.