Are magnetic field lines Spiral for Spiral Galaxies? If no, then how it look like topologically? I am an undergraduate doing summer project at USO. I am working on Sun's Magnetic field model. I got spiral graph for that, which looks like any spiral Galaxy. Do you think that there is some correlation between them. Or let me put this way, is magnetic field of Galaxy spiral?
Thank You in advance.
The short answer is: yes, magnetic fields in spiral galaxies are generally spiral in orientation. (But it probably isn't directly correlated with your solar model.)

For example, this is a map of radio polarization (a reflection of magnetic field direction) in the galaxy IC 342 by Beck et al. (2015):



(The short yellow lines are indicators of polarization, and thus magnetic field, direction. See here for details of the observation)

A very good, if somewhat technical, reference is Rainer Beck's recent (2015) review article "Magnetic Fields in Spiral Galaxies"; this discusses both observations of magnetic fields in nearby galaxies (and the Milky Way) and the models for how they might be generated.

He also discusses, for example, evidence for magnetica fields in the halos of galaxies; these are (seen in projection) sometimes radial and sometimes more X-shaped, as in the case of NGC 891:


(From Krause 2009; the short white lines indicate magnetic field line directions, based on radio polarization.)

The evidence for the Milky Way is somewhat ambiguous, for the usual reasons that it's hard to get a global picture of something you're inside of. One intriguing finding is that the magnetic field sometimes reverses direction as a function of radius; this hasn't been seen in other galaxies (though this may just be a function of resolution or the fact that we are measuring the Milky Way's magnetic fields primarily in a narrow layer of gas near the Galactic plane).