George wrote:

When our dear sun will die it will flare up in red gint frying till
earth maybe mars, after that it will end up in white dwarf, is this
mean that gravity of sun will also die off, then what will happen to
outer planets like saturn jupiter ect, will they wander in to deep
space if not end up colliding with other and eventually become planets
of some other sun

The sun will blow off a certain amount of its outer layers, but most of the
mass will remain. The outer planets will remain in orbit, just slightly
larger orbits than at present. That's if we haven't converted them to Dyson
spheres in the meantime.